Home › Authors › Katja Diefenbach Katja Diefenbach 3 books Biography German philosopher; professor of Aesthetic Theory at Merz Akademie in Stuttgart. Former lecturer at the University of Fine Arts (Berlin) and Humboldt University (Berlin) and director of the research project After 1968. Books by Katja Diefenbach Spinoza in Post-Marxist Philos Spinoza in Post-Marxist Philosophy 2025 Spekulativer Materialismus Spekulativer Materialismus 2018 Belgrad Interviews Belgrad Interviews 2000